Allow the size of folder contents to show in the file browser list

[Robert Lyon]

Currently on the filebrowser list we show the size of the files (see Content -> Files) but we don't show a size for the folders.

What would be very useful is if the folders showed the size of all the contents they contained.

[Mahara Bot (dev-mahara)]

Patch for "master" branch: https://reviews.mahara.org/7343

[Mahara Bot (dev-mahara)]

Reviewed: https://reviews.mahara.org/7343
Committed: https://git.mahara.org/mahara/mahara/commit/e05b93ee903dcbaca7495503627a1ac4b8693f2e
Submitter: Robert Lyon (<email address hidden>)
Branch: master

commit e05b93ee903dcbaca7495503627a1ac4b8693f2e
Author: Robert Lyon <email address hidden>
Date: Mon Dec 19 12:06:50 2016 +1300

Bug 1650980: Allow filebrowser to show the size of sub folders

Allow recursive counting so that:

When in 'subfolder A' we get size of 'sub-sub folder A' and when we
are in parent of 'subfolder A' we get size of both.

behatnotneeded

Change-Id: Iea7600a7c46205fc2fe315c2c4d231cc31f83e96
Signed-off-by: Robert Lyon <email address hidden>